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84 lines
2.5 KiB
84 lines
2.5 KiB
/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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/*
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* This file defines the the class to partition a graph.
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*/
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#pragma once
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#include <vector>
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#include "paddle/fluid/inference/analysis/data_flow_graph.h"
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#include "paddle/fluid/inference/analysis/node.h"
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namespace paddle {
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namespace inference {
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namespace analysis {
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/*
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* Detect the nodes in a sub-graph that meet some conditions. This class doesn't
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* modify the graph.
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*/
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class SubGraphSplitter {
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public:
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static const char *kMarkerAttrName;
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// Tell whether a node is inside a sub-graph.
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using NodeInsideSubgraphTeller = std::function<bool(const Node *)>;
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SubGraphSplitter(DataFlowGraph *graph, const NodeInsideSubgraphTeller &teller)
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: graph_(graph), node_inside_subgraph_teller_(teller) {}
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std::vector<std::vector<Node *>> operator()();
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protected:
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// Mark the nodes inside the accepted sub-graph using
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// node_inside_subgraph_teller.
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void MarkNodesInsideSubGraph();
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// Merge the marked nodes into sub-graphs and return the sub-graphs.
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std::vector<std::vector<Node *>> ExtractSubGraphs();
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private:
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DataFlowGraph *graph_;
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NodeInsideSubgraphTeller node_inside_subgraph_teller_;
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};
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/*
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* SubGraphFuse - Replace some nodes with the sub-graph node they are inside. To
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* some extent, the TensorRT engine is just a fusion op for a model.
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*/
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class SubGraphFuse {
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public:
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using NodeInsideSubgraphTeller = SubGraphSplitter::NodeInsideSubgraphTeller;
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SubGraphFuse(DataFlowGraph *graph, const NodeInsideSubgraphTeller &teller)
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: graph_(graph), node_inside_subgraph_teller_(teller) {}
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// The main method which run all the logic.
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void operator()();
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protected:
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// Remove the nodes inside sub-graphs and replace with the SubGraphNode.
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void ReplaceNodesWithSubGraphs();
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private:
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DataFlowGraph *graph_;
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NodeInsideSubgraphTeller node_inside_subgraph_teller_;
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};
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} // namespace analysis
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} // namespace inference
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} // namespace paddle
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